Among the following type of clouds given, cirrocumulus is the type of cloud that has the highest base. The correct option among all the options that are given in the question is the second option or option "b". These are the type of clouds that can be seen as white puffs or sometimes as grey puffs, high up in the sky.
Geologists use the "Hardness" test to determine the hardness of a mineral.
about 8000 m/s
It so happens that the vertical distance that a horizontally launched projectile would fall in its first second is approximately 5 meters (0.5*g*t2). For this reason, a projectile launched horizontally with a speed of about 8000 m/s will be capable of orbiting the earth in a circular path.
